原叶体

培养80～100d后原叶体成熟，其精子器呈球形，颈卵器为高等蕨类植物典型类型。

The prothallus matured in 80 - 100 days after inoculum . The antheridia is globular . The archegonia is of the type common in the high ferns .

原叶体发育为三叉蕨型；

The prothallus is of the Aspidium-type . development ;

播种21d左右发育形成幼原叶体，成熟原叶体呈心脏形。

The young prothalli develop in 21 days after sowing and the mature prothalli are cordate .

片状体顶端出现的分生组织发育为心脏形的原叶体，发育为槲蕨型（Nayar，1971）；

The prothallial development is of the Drynaria type ( Nayar , 1971 ) . The adult prothallus is cordate and hairy . The hairs are complex and varied .

原叶体发育为槲蕨型，接种后30d左右进入片状体阶段，毛状体出现在片状体形成之后，幼原叶体短舌状，成熟原叶体心脏形。

The gametophyte development is of the Drynaria type , prothalli formed in 30 days after inoculated in the medium , while hairs developed after the formation of the prothallial plate . The young prothalli are short tongue shaped and the adult prothalli are cordate .

原叶体是腐生的，不规则分枝的地下体。

The prothalli are saprophytic , irregularly branched , subterranean bodies .

孢子萌发类型为书带蕨型，原叶体发育为铁线蕨型；

Spore germination was of Vittaria-type and gametophyte exhibited Adiantum-type development .

蕨类植物孢子萌发及原叶体发育的观察

Observations on the Spore Germination and Prothallium Development of Ferns

培养25～33d后原叶体达到性成熟，P.cretica以雌性配子体为主，而P.umbrosa则以雄性配子体为主。

The Prothallus reached sexual maturity in 25 - 33 days . In p. cretica .

原叶体发育为三叉蕨型；蕨类植物孢子萌发及原叶体发育的观察

The prothallus is of the Aspidium-type . Observations on the Spore Germination and Prothallium Development of Ferns

原叶体无毛状体，中脉厚，精子器和颈卵器较大；

The prothallium has no trichome but thick midvein , large antherid and archegonium . However , O.

不同基质上中国蕨配子体和幼孢子体生长发育存在差异，尤其是心形原叶体的形态差别明显；

The gametophyte and infant sporophyte morphological development of S.grevilleoides represented very different features on different culture substrata .

腐叶土基质上的心形原叶体上未见颈卵器的发生，因而其有性繁殖过程不能完成；

In humus soil , cordate prothalli did not bear archegonia , and thus the process of sexual reproduction ofSgrevilleoides could not be finished .

研究无菌条件下不同浓度砷对蜈蚣草的孢子萌发、假根和原叶体生长发育的影响。

The effects of different concentrations of arsenic on spore germination and rhizoid and prothallium growth of Pteris vittata under aseptic condition were studied .

结果表明，森林土、琼脂和蛭石间原叶体数无差异，但成苗率间差异显著；

The results showed that there was no significant difference of the numbers of prothallus induced from spores by forest soil , agar and vermiculite , but the planting rates among them were significantly different .